Ing grimond



No. 643,960. I Pafnted's mm 20, 1900. A; m. ammmu' & cmamou soasm MAKING MACHINE.

(Application filed. Aug. 4, 1899.) (No Model.) 3 Sheets-Sheet l.

N Ffizar; (I.

7H5 uonms PETERS co.v PHoTo-Lrma, WASHINGTON. 0v 0.

No. 643,960. Patented Feb. 20, I900. A. m anmoun & .1. cmmnou.

BOBBIN MAKING MACHINE.

(Application filed Aug. 4, 1899 (No Model.) 3 Shaats-Sheet 2,

\ 1 I II THE uokms PETERS co. Pno rcum'noq wAs HmeToN, o. c.

Patented Feb. 20,1900. A. M. GRIMUNI] &. J. CRIGHTON.

BOBBIN MAKING MACHINE.

' (Application filed Aug. 4, 1899.) (No Model.) 3 Sheets-Sheet 3.

WITNESSES A 77' EYS NITED STATES PATENT OFFICE.

ALEXANDER MOULDING GRIMOND AND JAMES ORIGHTON, OF DUNDEE, SCOTLAND.

BOBBlN-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 643,960, dated February 20, 1900.

' Application filed August 4, 1899- To ctZZ whom, it may concern:

Be it known that we, ALEXANDER MoULD- ING GRIMOND, residing at 1 King street, and JAMES CRIGHTON, residing at 29 Rose street, Dundee, in the county of Forfar, Scotland, subjects of the Queen of Great Britain, have invented a certain new and useful Improvement in Bobbin-Making Machines, (for which we have made application for a patent in Great Britain, No. 411, and bearing date Jan uary '7,1899,) of which the following is a specification.

Our invention relates to machines for making or forming bobbins from blanks or relatively-rough pieces of Wood or the like in a more simple and expeditious manner than hitherto by suitably assembling together and relating in one such machine the, necessary parts for boring and turning or similarly forming the said bobbins at one operation or handling.

Referring to the two sheets of drawings which accompany this specification, Figures 1 and 2 are end and front elevations, respectively, of ourimproved machine. Fig. 3 is a part-sectional plan projected from A A, Fig. 1; and Fig. 4 is a complete outside plan projected from Fig. 2. Figs. 5 to 18, inclusive, are separate details of parts of our improved machine, drawn to a larger scale for clearness, Figs. 5, 6, and 7 being side elevation, vertical section, and plan, respectively, of our hopper or feeding apparatus. Figs. 8 and 9 are details of the positive roller-feed mechanism used in connection with such apparatus. Figs. 10 and 13 are part sections of the opposing working head-stocks of the machine, while Figs. 11 and 12 show cross-sec-. tions at M M and N N of Fig. 10 and Figs. 14 and 15 cross-sections at" P P and R R of Fig. 13. Figs. 16, 17, and 18 show the sequence of operations in the introduction or chucking of a blank for treatment between the heads, Figs. 10 and 13; and Fig. 19 is a detail section showing the chutes for the blanks.

In the several figures the same referencenumerals indicate the same or like parts.

In carrying our invention into eifect or practice We arrange the mechanism of our improved machine so that the blanks 2 0 are Serial No. 726,138- (No model.)

first supplied in bulk or quantity into a hopper or automatic feeding apparatus 21, whose functions are to present each blank to the machine for treatment in correct time and position. From such hopper 21 it passes to a reciprocating carrier 22, which advances it to and retains it between the opposing portions 23 and 24 of a hollow mandrel until the chucking mechanism 25, connected therewith, receives and holds it. When so held and a motion of rotation imparted to it by means of the pulley 26, bits 27 are advanced through the aforesaid hollow mandrel into each of its ends, so as to each. bore one-half, or more or less, as desired, of the required hole 28. Simultaneously the outside of the bobbin 29 is formed by tools acting as hereinafter described. The complete bobbin is finally released and ejected and the process is repeated with a fresh blank 20.

It is to be clearly understood that after the charging of the hopper 21 with the blanks the entire succeeding cycle of operations is rendered wholly automatic and relatively synchronous by the connection of the various active parts by suitably-proportioned toothed gearing 3O orequivalent positive mechanism, although any part may be disconnected, if desired. Thus the feeding apparatus 21 may be disconnectedfso as to permit of feeding the carrier 22 by hand or otherwise, or the boring mechanism should spindle-holes not be desired.

In constructing the feeding apparatus 21 we preferably divide it into three slides or chutes 31, 32, and 33, (see Fig. 19,) whose planes are parallel to the mandrel-axis. Valves or doors 34 and 35, actuated by linkwork 36 from an eccentric 37 or the like, control and regulate the supply of blanks in the following manner: A roller 38 is furnished with a groove 39, so proportioned as to just containone blank 20. When rotated by the crank 40, this roller carries the said blank around so as to drop it into the carrier 22, as shown by Fig. 8, and returning receives and carries a fresh blank until the central slide or chute 32 is empty. Each reciprocation of the crank 40 has meantime caused the rotation of a ratchetwheel 41 through the disk 42 and pawl 43 until, just as the last blank from 32 is fed,

carried by a head-stock 65.

the arm 44 on the wheel ll presses back the springholder 45, so as to release the arm 4.6, which it then advances into the position shown in the drawings, so moving the valve or gate 34 through the arms or links 48 and 49 until such valve at one movement closes the central chute 32 and opens the left-hand chute 31 to anew supply the roller 38. In due course this also becomes exhausted; but now the arm 50 on the ratchet-wheel 51 acts on the arm 52 so as to open the valve 35 of the chute and close 31 and 32 through the arms or links 55 and 56 and the said valve 35. When in turn the chute is exhausted, the arm 53 on the back of the wheel 51 pushes the arm 54, so as to again return the arm 52 to its spring-holder 57, and so to open the central chute 32, which has meantime been charged with fresh blanks, as the chutes 31 and 33 may be in turn. The chutes may be made of Sllfllclellh length to contain any desired number of blanks, and more than one set of three chutes may be supplied to a machine and brought into action, as required.

.the linkwork 63, which is provided with slots 64 where necessary for due adjustment and proper application of the cams'motion.

The hollow mandrel is of novel design and consists, essentially, of two distinct and opposing tubes 23 and 24: on the same axis, each Adjustment of the space between these head-stocks, as required by the length of blank treated, is obtained by moving one or both along their slide 66, together with the wheel 67,for transmitting motion to the pinion 68, the shaft 69 having a keyway 70 for this purpose along its entire length.

One side or portion 23 of said mandrel car ries the pulley 26 for rotating the work, which is preferably driven at high speed independently from the machine proper, while the other side 24 is loose, so that it revolves only with the work. Each carries in a screwed socket 72, or as otherwise convenient, an interchangeable hollow, serrated, or fork chuck 73, suited to the character of the work it is to hold. The driving half 23 of the mandrel rotates continuously at high speed, and to avoid the jarring or injury consequent upon its seizing the motionless blank 20 we employ a novel arrangement of gradual chucking mechanism. (Shown in detail by Figs. 10 and 13 and in sequence of operation by Figs. 16,

17, and 18.) Within the driving half 23 of,

the hollow mandrel, but not revolving with it, we fit a hollow gripper or tube 74, actuated by a cam through the slide 76, lever 7'7, arm 78, and collars 79. The blank having been raised by the carrier 22 from the position Fig. 16 into line of the mandrel-axis, the gripper-tube 74 is advanced by its cam so as to emerge from the hollow driving-chuck and press the blank ,onto'the opposing driven chuck, as shown by Fig. 17. The said side 24, which carries the latter, is connected with a cam through the lever 81 and slide 82, and immediately on the blank being held by its chuck it is moved forward by the said cam, the gripper-tube meantime retiring at an equal rate, until it forces the blank upon the fork-chuck of the driving side. The carrier 22 has also meanwhile retired, and, as shown in Fig. 18, the boring and turning of the now-revolving. blank is free to proceed. Adjustment of the levers 77 and 81 may be obtained by the rotation of the screw 83, passing through their screwed cross-heads St.

The boring operation for which the construction of our hollow mandrel before described is specially adapted is performed as follows: Right and left hand non-rotating screw-bits 27 are carried in non-rotatin g chucks 86, keyed or guided at 87, which are again carried loosely on the inner ends of opposite right and left hand revolving hollow screws 88, working in fixed nuts 89 in the head-stocks 65. For the actuating of these screws we provide at each end of the machine a crank 90 of variable radius after the type used in slotting-machines and the like and from which a connecting-rod 91 passes to give reciprocating motion to a toothed wheel-segment or quadrant 92. This latter gears through the wheels 95 and 67 with the pin ion 68 on the shaft 95, carrying the hollow screw, to which it thus imparts a motion first in one direction and then in the other. The screw revolving with such shaft95 on a sliding key receives from its fixed nut a motion of translation and so carries its attached, but non-rotating, boring-bit through the hollow mandrel into and out of the revolving work. The travel of each bit may be regulated by the amplitude given to the crank 90, and to prevent the bits colliding in the center of the work the cranks may be set out of time or at an angle one with the other, so that the-one bit may have begun to return before the other has fully advanced, as shown in Fig. 18. One or both of the bits may also be caused to travel through more than half of the work, so as to insure a clean and complete hole. In the bitchucks 86, the hollow gripper-tube 74, and the loose or driving side 24 of the mandrel where rotating and non-rotating parts mutually engage we may employ split collar, ball, whitemetal strip, or other known form of antifriction-bearing.

With regard to the turning or other formation of the outside of the bobbin 29 we are aware that various machines have already been constructed for this purpose, and while we may use any of them or any part of any of them in connection and gearing with our machine we do not limit ourselves to the use 5 of any one of them, nor do we therefore claim or illustrate them in connection therewith.

Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In bobbin-making machines, the combination of right and left hand non-rotatin g bits 27, screws 88, nuts 89, quadrant 92, connecting-rod 91, variable crank 90, and hollow mandrels through which the bits 27 respectively [5 extend.

2. In bobbin-making machines, the gradual chucking apparatus consisting of the reciprocating carrier 22, gripper-tube 74., hollow mandrel-sections 23 and 24, through one of which the gripping-tube moves and means for actuating these parts herein set forth.

3. In bobbin-making machines, the feeding 'apparatus, consisting of the valve-regulated chutes; the grooved roller 38, and the recip- 2 5 rocating carrier 22, with their actuating mechanism, as herein set forth.

4. In a bobbin-making machine, the combination of two hollow mandrel-sections, a boring apparatus working through one of the said sections, a gripper-tube working in the other of said sections, a boring-tool working in the gripper-tube, means for actuating said parts, and a feeding apparatus for delivering the blanks to the mandrel-sections.

5. The combination of a hollow mandrel adapted to engage the Work and to hold the same, a boring-tool movable longitudinally in the mandrel to bore the work, a screw having rotatable connection with the boring-tool,

40 means for turning the screw, such means permitting the longitudinal movement thereof, and a stationary nut in which the screw works, whereby the screw with the boring-tool is advanced longitudinally.

6. In a boring-machine, the combination of a reciprocal mandrel-section, a second mandrel-section, a reciprocal gripper in said mandrel-section, means for advancing the gripper longitudinally toward the reciprocal mandrelsection to clamp the work between the two,

such means also serving to retract the gripper, means for moving the mandrel-section toward the gripper in time with the retraction thereof to engage the work with the second mandrel-section, a carrier movable transversely of the longitudinal line of the gripper to advance the work to a position between the gripper and the respective mandrel-section, and means for boring the work.

7. The combination with a machine for working blank material, of a plurality of chutes serving to carry the blanks, a valve mounted to command said chutes, closing one as the other is opened, a grooved roller servin g to receive the blanks from the chutes, and a reciprocal carrier into which the blanks are delivered from the grooved roller, the carrier moving the blanks to the said machine.

8. In a boring apparatus, the combination of two hollow mandrel-sections, one of which is mounted to slide, a gripper movable in the other mandrel-section, and means for reciprocating the gripper and the said reciprocal mandrel-section, such means serving first to move the gripper toward the reciprocal mandrel-section and to retract the gripper, the reciprocal mandrel-section moving toward the gripper simultaneously with its retraction to engage the work with the other mandrel-section.

9. In a boring-machine, the combination of a hollow mandrel-section mounted to turn, a second hollow mandrel-section mounted to turn and reciprocate, a boring device arranged in each mandrel -section, a gripping -tube mounted to reciprocate in the first mandrelsection, the gripper-tube inclosing the boringtool of said mandrel-section, and means for reciprocating the gripper-tube and the second mandrel-section, such means serving to advance the gripping-tube toward the second mandrel-section and subsequently to retract the gripping-tube and to simultaneously move the second mandrel-section toward the first.

10. In a boring-machine, the combination of a non-rotative boring-tool, a rotative screw with which the tool has rotary connection, a stationary nut in which the screw works, and means for imparting a turning movement to the screw, such means permitting the longitudinal movement of the screw.

In witness whereof we have hereunto set our hands in presence of two witnesses.

' ALEXANDER MOULDING GRIMOND.

JAMES ORIGH'ION. Witnesses:

ALLAN BAXTER, ROBERT GIBsoN. 

